Uguisu no su wa ugokedomo nushi mo nashi kaze ni makasete izuchi inu ran - Shui Wakashu(English Translation & Meaning)

鶯のすはうごけども主もなし
風にまかせていづち去ぬらん

Roma-ji: Uguisu no su wa ugokedomo nushi mo nashi kaze ni makasete izuchi inu ran
English Translation: The warbler's nest
sways and moves, and yet
its master is gone;
giving itself to the wind,
where could it have flown away?
Meaning: The warbler's nest sways, yet its master is nowhere to be seen; trusting itself to the wind, where could it have gone?
Commentary: Book Seven Names of Things 374

Headnote: "Suhōgoke (a kind of moss)"
The poet says that the warbler's nest sways in the wind, yet its master is nowhere, and wonders where it has gone, trusting itself to the wind. Within the loneliness of a nest without its master, the name "suhōgoke" given in the headnote is hidden in the run of sounds "su wa ugoke" in the second line. The headnote names the thing hidden in the poem.
The author, written as Sukemi, is Fujiwara no Sukemi. A son of Fujiwara no Hirotsune, he was a mid-Heian poet known as Tōroku. He excelled at poems hiding the names of things, and his personal collection is the Tōrokushū.

First line, "uguisu no," means "of the warbler." Whereas 354 at the head of the book sang of the warbler building its nest, here the nest left without its master is sung of, the two forming a pair around the nest.
Second line, "su wa ugokedomo," means "though the nest sways," hiding the name "suhōgoke."
Third line, "nushi mo nashi," means "its master is gone," and the poem pauses here.
Fourth line, "kaze ni makasete," means "trusting itself to the blowing wind."
Final line, "izuchi inu ran," means "where has it gone," with "ran" an auxiliary of present conjecture.
Author: Fujiwara no Sukemi
Source: Shui Wakashu
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